Note: This was transcribed in order to make it more useful, but it should be noted that it likely contains errors due to misinterpretations of the small and photographically-illegible handwriting. -- 2007 Donna Hay
The entire book Genealogie of the Hayes of Tweeddale, which makes up the bulk of William Perry Hay's research in the 16th-18th century Hay ancestry, was purchased in electronic form and is included here for further reference.
![]() |
| History p1 - click on picture for larger view |
I have taken some pains to read and digest this book, for I believe it contains a more or less accurate genealogy of that branch of the Hay family from which I am descended, and, although an interval of about 100 years intervenes between the last Hay mentioned in this account and the first Hay of my family that came to America, either I or some one of a later generation may be assisted by my work to connect the two.
My reasons for regarding the Hays of Tweeddale as my ancestors are as follows: My great-grandfather, his father and grandfather [Thomas Hay, William Hay, and Robert Hay] were born and lived for the greater part of their lives in or near the town of Kelso, on the River Tweed, Roxburghshire, Scotland and distant from Edinburgh only a few miles. Tweeddale was in the same part of Scotland. My great-great-grandmother [William's wife Jane Ann Taylor Hay] and her mother likewise came from Scotland and were from families such as the Cranstons, Turnbulls and Taylors, who, according to Father Hay's account, were living in the vicinity. Some weight also may be attached to the common(?) use(?) of the Christian names Thomas, William and John in the old records as well as in later generations of the family.
The Hays trace their ancestry, according to ancient historians, to a laborer at the battle of Luncarty under Kenneth the Third, about 983 A.D., who there, with his two sons, armed only with the yokes of their oxen compelled
![]() |
| History p2 |
![]() |
| Hay coat of arms |
This story is regarded by Father Hay as fabulous in all its circumstances; it has all the ear marks of improbability: none of the old manuscripts mention the name Hay in connection with this battle; coats of arms were neither bestowed nor used in Scotland at that time; and, most important of all, the name of the family then and for years after was not Hay, but de la Haya or La Haya. To Father Hay it seems much more probable that the family came from the Province of Normandy in France, where, according to him, in old manuscript lists of army, church and state officials the name de La Haya often occurs. Some of the de La Hayas are supposed to have settled in England, where, under William the Congueror they got vast estates and gained renown as warriors. During the lives of Malcolm the Fourth (1154) some of the de La Hayas are supposed to have gone to Scotland and these it was who became the progenitors of the Hays of Tweeddale.
And yet, after having practically rejected the ancient story, Father Hay bases his genealogy upon the lores(?) of the battle of Loncarty and from these traces the Hay family in a direct time for over 700 years or until the time of Charles II of England.
In addition to the straight line of succession leading to the Marquis of Tweeddale several collateral lines are more or less fully dealt with by our author. Thus, of the two sons of the original Thomas Hay, the older, it is told succeeded to that part of his father's possessions(?) that lay to the north, established himself there and founded the House of Errol which continues up to the present day. The younger son Achaius established himself in Tweeddale and became the progenitor of the branch of that name.
![]() |
| History p.3 |
![]() |
| History p.4 |
1. Thomas Hay, -- to 980
2. Achaius Hay, 980-1010 – House of Tweeddale
3. Kenneth Hay, 1010-1050
4. Kenneth Hay, 1050-1094
5. Malcolm Hay, 1094-1130
6. Sir Thomas de La Haye, 1130-1150 of Lockarwart
7. Sir William de La Haye, 1150-1190 of Lockarwart
8. Sir William de La Haye, 1190-1220 of Lockarwart
9. Sir Patrick de La Haye, 1220-1240 of Lockarwart
10. Sir Patrick de La Haye, 1240-1291 of Lockarwart
11. Sir Hugh de La Haye, 1291-1306 of Lockarwart
12. Sir Gilbert de La Hay, 1306-1320 of Lockarwart
13. Sir Thomas de La Hay, 1320-1350 of Lockarwart
14. Sir Thomas de La Hay, 1350-1380 of Lockarwartt
15. Sir William de La Hay, 1380-1410 of Lockarwart
16. Sir William Hay, Lord Yester, 1410-1431, Tweeddale
17. Sir Thomas Hay, Lord Yester, 1431-1433, Tweeddale
18. Sir David Hay, Lord Yester, 1433-1475, Tweeddale
19. Sir John Hay, Lord Yester, 1475-1500, Tweeddale
20. Sir John Hay, Lord Yester, 1500-1510, Tweeddale
21. Sir John Hay, Lord Yester, 1510-1513, Tweeddale
22. Sir John Hay, Lord Yester, 1513-1549, Tweeddale
23. Sir John Hay, Lord Yester, 1549-1554, Tweeddale
24. Sir William Hay, 1554-1582, Lord Yester, Tweeddale
25. Sir William Hay, 1582-1591, Lord Yester, Tweeddale
26. Sir James Hay, Lord Yester, 1591-1625, Tweeddale
27. Sir John Hay, Lord Yester, 1625-1654, Tweeddale
28. Sir John Hay, Lord Yester, 1654-1697, Tweeddale
29. Sir John Hay, Lord Yester, 1697-1730, Tweeddale
30. Sir Charles Hay, Lord Yester, 1730- Tweeddale
![]() |
| History p.5 |
![]() |
| History p.6 |
![]() |
| History p.7 |
![]() |
| History p.8 |
1380-1410 Sir William de La Hay of Lockarwart.
Married Johanna Giffard (or Gifford) daughter and heretrix of Heugh Lord Giffard of Yester, by whom he had 4 children: William, who succeeded; John, killed at the battle of Verneulle, in France; Margaret, married to William Earle of Angus; and Cecilia, married to Alexander Hume, progenitor of Lord Hume, also killed at the battle of Verneulle. The second son, John, left a son, William Hay of Talaw (Charter dated 1469).
1410-1431 Sir William Hay
Married Alice Hay, daughter of Gilbert Hay, first Earl of Errol, by whom he had 10 children: Thomas and David, who both succeeded; Edmund, first Laird of Linplum and Talaw; Andrew a churchman; Nicolas, a pretender of Bathoms; Henry, of whom there is no information; a son, baird of Bara, name unknown; Alice, married to William Earl of Errol; Margaret, married to a son of William Earl of Angus; Martha, who married Richard Morhead of Lachope, Secretary of State of Scotland.
1432-1435 Sir Thomas Hay
Did not marry and survived his father only 2 years. He was succeeded by his brother.
1435-1466 Sir David Hay, Lord Yester
(vested Lord on April 6, 1435 of the Charter by King James 1439) Married Elizabeth Dowglas, daughter of the Earl of Angus by whom he had 4 children: John, who succeeded; Andrew, parson of Biggar; Margaret, who married Neal Cunninham of Barns in Fife; and a daughter, name unknown, who married Mr. Master of Erskine.
![]() |
| History p.9 |
1500-1510 John Hay, Lord Yester
Married Elizabeth Cunningham, daughter of Sir George Cunningham of Beltone by whom he had 5 children: John, who succeeded; Thomas who died before his father; George, a churchman who enjoyed a benefice; Margaret who married William Lord Borthwick; and Isabel who married Robert Lauder of the Bass.
1510-1513 John Hay, Lord Yester
Married Sophia Keith, daughter of the Earl of Mareshall, by whom he had 3 children: John, who succeeded; William of Nether Minian and Montoun whose grandchild, being benetrix thereof, was married to this Alexander Hay seventh son of Alexander Hay of Kenneth, and was first secretary and later register in the time of Queen Mary; Janet married Alexander Lord Hume, Chamberlain of Scotland, who was beheaded by King James IV. This John Hay was killed at Flowdonfield Sept 9, 1513.
1513-1544 John Hay, Lord Yester
Married Elizabeth Douglas, daughter of George Douglas Master of Angus, by whom he had John, who succeeded; Elizabeth, who married Lord Setton, and on his death, Lord Salton. After the death of Elizabeth Douglas, John Hay married __?__ Dickerson, supposed heiress of Smifield, by whom he had Thomas, the Laird; John and Gilbert, Parsone of Stobo, and father of Archibald Hay, gentleman usher to the late Queen, mother of King Charles and King James. Thomas, the Laird, had John Hay,
![]() |
| History p.10 |
1544-1554 John Hay, Lord Yester
Married Margaret Levingstone, daughter of Lord Livingstone, by whom he had 5 children: William, who succeeded; Thomas, a churchman and provost of Balhouss; Elizabeth, who married Lawder of the Bass; __?__ who married the Laird of Traquire; and Marie, who married Congleton of Cougleton.
1554-1586 William Hay, Lord Yester
Married Margaret Ker, daughter of Sir John Ker, warden of the middle marches, by whom he had 6 children: William and James, who both succeeded; Margaret, who married James, Master of Borthwick, son of James the second Lord of Borthwick; Katherine, who married Lord Swinton; Jean, who married James Hay of Barott, commissar of Glasgow, father of Mr. Alexander Hay; and Elizabeth who married Mr. Robert Ker of Brumlands.
1586-1591 William Hay, Lord Yester
Married Elizabeth Maxwell, daughter of Lord Harris, by whom he had 6 daughters: Margaret, who never married; Jean, who married Twedie, laird of Drumaliere; Maria, who married Alexander, laird of Horseburgh; Elizabeth, who married the laird of Waton; Grissel, who married John Hepburn, laird of Atherstown; and Agnes, who never married. This William Hay had a feud with the House of Traquire over the support the latter was giving to a band of thieves and cutthroats that infected the country and of whom Lord Hay killed and defeated(?) a great
![]() |
| History p.11 |
1591-1625 James Hay, Lord Yester
Married Margaret Ker, daughter of the Earl of Lothian. Her mother was Margaret Maxwell, daughter of Lord Harris. There were 5 children: John, who succeeded; William, who regained by purchase the lands of Linplum; Robert, who died young, Margaret, who married first Alexander Setton and after his death, James Earle of Kalendar; Elizabeth, who died on the eve of her marriage to Lord Dalhousie.
1625-1654 John Hay, Lord Yester -- Earl of Tweeddale
Married Jean Setton, daughter of Alexander, Earl of Dumfermlyne, by whom he had a son John, who succeeded. She died 8 days after the birth of this child. John Hay, 15 years later, married Margaret Mongomerie, daughter of the Earl of Eglinton, by whom he had 7 children -- Alexander, James, William, Charles, Margaret, Grissall, and Anne, all of whom except William died in their childhood. William became laird of Drumalliar. This John Hay was active against the rising power of the Prelats and a zealous promoter of the national Convent whereby he gained the dislike(?) of King Charles and was not given the dignity(?) of an Earl(?). He became surety for the debts of his sister's son Charles Earl of Dumfermlyne which cost him a large sum of money and by his own extravagances but so much more that he was forced to sell large part of his property. In 1647 he was created Earl of Tweeddale by King Charles I.
![]() |
| History p.12 |
1697-1720 John Hay, Marquis of Tweeddale
Married the daughter of the Earl of Lauderdale by whom he had Charles, the present heir; John, now living; Walter and Alexander, both deceased; William; Anne and Henry. The Earl of Lauderdale, father-in-law of this John Hay, at first professed the greatest friendship and promised to bestow his entire fortune or property upon his son-in-law. Lauderdale's own son was dead and by rights his daughter
![]() |
| History p.13 |
![]() |
| Arms of the Marquis of Tweeddale, 1730 |
![]() |
| History p.14 |
1050-1094 -- Achaius, who married an unknown heiress in the North
1380-1410 -- John, the 2nd son of Sir William, is said to have left a son -- William Hay of Talaw
1410-1431 -- Edward, first Laird of Talaw; Henry of whom there is no information; and another son name unknown, were sons of Sir William de La Hay of Lockarwart
1510-1513 -- William, son of John Hay, Lord Yester, whose grandchild is said to have married to Sir Alexander Hay, seventh son of Sir Alexander Hay of Kenneth.
1513-1544 -- Thomas, John and Gilbert, sons of John Hay, Lord Yester. Thomas appears to have succeeded to the Smifield title. Gilbert, person of State, had a son, Archibald. John had one son, Andrew, and Andrew had 2 sons at most, John and Andrew.
1554-1586 -- A daughter of William Hay Lord Yester is said to have married James Hay of Barott, COmmissor of Glasgow, father of Mr. Alexander Hay.
1591-1625 -- William, second son of James Hay Lord Yester, regained by parentage the lands of Linplum.
1625-1654 -- William, third son of John Hay Lord Yester, by his second wife became Laird of Drumallier.
1654-1697 -- John Hay Earl of Tweeddale had a son David who was a lieutenant in the Kings Guards and another Alexander of whom there is no account.
1697-1720 -- John and William sons of John Hay Marquis of Tweeddale [and a Henry too-DLH]
![]() |
| History p.15 |
Tweeddale | Errol | ||
1300 | |||
Gilbert 1320 | | | Gilbert | |
| | | | ||
Thomas 1350 | | | ||
Thomas 1380 | | | ||
1400 | |||
William 1410 | | | ||
William 1431 | | | ||
Thomas 1435 | | | ||
David 1466 | | | William 1462, 1st Earl | |
1st Baron | John Lord Yester 1475 | | | Nikol 1470, 2nd Earl |
1500 | |||
| | William 1506, 3rd Earl, Yr of Nikol | ||
John Baron Yester 1513 | | | William 1513, 4th Earl | |
| | William, 5th Earl | ||
?John 1530 (Father Hay) | | | ||
John Baron Yester 1544 | | | William 1541, 6th Earl | |
?John 1554 | | | George, 7th Earl | |
William Baron Yester 1586 | | | Andrew 1581, 8th Earl | |
William Baron Yester 1591 | | | ||
1600 | |||
James Baron Yester 1625 | | | ||
| | Francis 1631 9th Earl | ||
| | William 1634, 10th Earl | ||
1st Earl | John, Earl of Tweeddale 1654 | | | |
| | George 1684, 11th Earl | ||
1st Marquis | John, Earl of Tweeddale 1697 | | | |
1600 | |||
| | John 1724, 12th Earl |
![]() |
| History p.16 |
Errol | Tweeddale | |
\ | / | |
Dalrymple.Hay | / | |
Baron of Park 1798 | / | |
\ | Weterston 1782 | |
\ | Percival 1763 | |
\ | Haystoun 1635 | |
\ | Smithfield 1483-1549 | |
\ | / | |
\ | Tabasco | |
\ | Linplum | |
\ | / | |
\ | Gifford 1414 | |
\ | / | |
\ | / | |
Gilbert | ||
| | ||
| | ||
1334 |
In the diagram above I have attempted to show the two main branches of The Hay family in Scotland and the families which have diverged(?) from them. The marriages into the Tweeddale branch of the Fraziers and the Giffords were undoubtedly(?) a most important means of bringing that branch into (alliance)(?) and the coat of arms of the present Marquis of Tweeddale has quarterings indicating the mergers(?) with both of these families.
![]() |
| History p.17 |
Linplum was given to Edmund by his brother David, son of Robert Hay of Ledgerwart.
This line had its origin from the second son of Sir William Hay Lord Yester, about the year 1420
Edmund Hay, Tala, married Anabella, sister of Thos. Boyd, Earl of Arran. His son
__?__ Hay (see p.17 in Hays of Tweeddale) married a daughter of Lord Somerville. Their son
William Hay, married a daughter of the Laird of Hermeston. Their son
John Hay, of Tala, married a daughter of Cockburn of Hederland. Their son
William Hay of Linplum, married Jean Spotswood. Their son
William Hay of Bara, Linplum or Windon, married Margaret Hay, daughter of the Laird of Monton, whose father was __?__ Hay, Laird of Monton, oldest son of a second marriage of Crookback Lord Yester. Their son
John Hay of Bara, Register of Scotland was tried for treason and acquitted in 1641. He died in 1654. His wife was Marian Johnston, daughter of the second son of the Laird of Newby, her mother was a daughter of Somerwell, Laird of Carneffen. His second wife was Rebecca Thompson, daughter of Alexander Thompson of Duddingstone and Margaret Preston, sister of President Preston. John Hay's children by his first wife were: Henry, William, John, Alexander, and Janet. Of these, Henry became Commissar of Edinburgh, married a daughter, Helen, of the Lighton, Laird of Creich, and had 5 children -- John, William, Henry, Maria and Euffen. William Hay, of Aberladie, clerk of the Session, married Helen, daughter of Sir John Sinclair and had 6 children --
John of whom we have no record
Henry, who married a daughter of Murray of Reading and left one son, William, who died without issue.
William, who married Margaret Cruickshanks and left 3 children: William, Margaret and Janet.
James, who married Jean Bunteinn and had 4 children:
![]() |
| History p.18 |
![]() |
| History p.19 |
In the Congressional Library I have been able to consult a "Genealogical Chart of the Family of Hay of Smithfield, Haystown and Kingsmeadow" prepared by Mrs. Louisa Lettica Friden (Trotter) in 1880. It consists of a single sheet unfolding to about 3 feet square with 7 concentric circles, each circle presumably representing a generation. John Hay, founder of the house, is in the center and his descendants arranged around him.
It is stated that John Hay was the 14th in descent from William de la Haya, cup bearer to Malcolm IX and William the Lion who died in 1170.
A note states that "In the list of captains who came from Normandy in 1066, the famous Prince Le Sieur de la Haya is mentioned, and for some generation after they settle in Scotland the family retained the name De La Haya."
John Hay married Grigale Thompson March 7, 1712 and had by her a large family -- James, John, Adam, Alexander, James, Anna, Huh, Helen, Margaret, Elizabeth, Alison. He was first succeeded by James, who although twice married, left no descendants. He was then succeeded by John (1758-1820) who had seven children -- Elizabeth, Grace, Adam, Charles, Jane, Jemima, and Samuel. Of these children, Jemima and Samuel died young and left no descendants. The surviving daughter married into other families. Adam succeeded and left 3 daughters and 1 son who grew to maturity but his 6 children died young and the line was extinguished.
The other children of John Hay: Alexander died and left no children. Jane married in 1778 the Rev. Robert Hamilton. Anne married George Cranston of Bumal. All the others died or left no descendants beyond the next generation.
The last generation given in the chart extends up to about the year 1817 and does not include a single person by the name of Hay. Nor can I find anyone from whom my family might have branched off in the generations extending from 1600 to 1750. My great-great-great-grandfather must have been born somewhere around 1750.
![]() |
| History p.20 |
![]() |
| Arms of the House of Errol |
From a careful examination of "The Court Book of Urie and Kincardineshire, 1604-1747" reprinted by the Scottish Historical Society, I gather the very definite idea that the Hays of these houses are only most distantly related to the stock from which my family has come.
According to the legendary recount the surname of the two families of Erroll and Tweeddale carried as far back as the 10th century. It is certain that by the 13th or 14th century they were established in their respective places and while from time to time there were intermarriages, the two lines have remained distinct up to the present.
The House of Erroll had its headquarters in the Castle of Slain in what is now Aberdeanshire and nearly 150 miles north of Edinburgh. The lands belonging to Urie and Kincarshire were just north of the River Dee and north or northwest of the town of Aberdeen.
None of the names of the members of any of these houses resemble(?) any of the history of my family. I am confirmed in the belief that we have descended from the house of Tweeddale.
![]() |
| History p.21 |
"The Scottish Nation or the Surnames, Families, Literature, Honors, and Biographical History of the People of Scotland." by William Anderson, 1863
Vol. II, p, 141
"Errol, Earl of a title in the peerage of Scotlandm, first confirmed by King James the Second on the 17th March 1452-3 with that of Lord Hay, on Sir William Hay of Errol, descended from William de la Haya, principal butler at the court of King Maldolm IV, and witness to many of his charters. According to tradition, Hay, a brave rustic in the reign of Kenneth II, by whose exertions the Danes were defeated about 980, was the founder of the noble family of Errol, but Douglas, in his "Peerage," asserts that the family Hays of Scotland are certainly a branch of the Anglo-Norman Hays who came into Britain with William the Conqueror."
Then follows the story of the battle of Loncarty in Parthshire, essentially as given elsewhere. The following account of the origin of the name is of interest: "It is said that after the Danes were defeated, the old rustic lying on the ground, wounded and fatigued, cried "Hay! Hay!" which word became the surname of his posterity."
"It appears from many histories that there were families of the name of Hay both in Italy and France even before the era of the battle of Loncarty."
A genealogy of the family is given which extends over several pages showing that in many generations one or more of this house has held high position and has brought honor upon the name. A mere outline of this genealogy is as follows:
Sir Gilbert de la Haya, descendant in the fifth generation from the above William de la Hay, about 1389
William, 1st Earl of Errol, son of above, about 1441 or 1457.
![]() |
| History p.22 |
Nicol, 2nd Earl, son of 1st Earl. Died 1470
William, 3rd Earl, brother of Nicol. Died 1506
William, 4th Earl, son of 3rd Earl. Slain at Floddin, 1513.
William, 5th Earl, son of 4th Earl. Died about 1535 without male issue. The earldom devolved upon:
George, 6th Earl, son of Hon. Thomas Hay of Logie-Almond, second son of the 3rd Earl. Died sometime after 1574.
Andrew, 7th Earl, son of George, married Lady Jean Hay, daughter and heiress of William the 5th Earl, there uniting the male and female branches of the family. Died in 1585. His eldest son Alexander, died before his father.
Francis, 8th Earl, second son of Andrew. Died in Slain Castle in 1630. He was a staunch Catholic.
William, 9th Earl, son of Francis by his third wife, the other two having no children. He was brought up a Protestant. Died Dec 7, 1636 after having squandered most of his fortune.
Gilbert, 10th Earl, son of William. No issue. Died 1666.
John, 11th Earl, cousin of Gilbert, and son of Sir George Hay of Killows, who was son of Andrew, 7th Earl by his second wife. Died 1704.
Charles, 12th Earl, son of John, died unmarried in 1717 and was succeeded by his sister, Lady Mary, Countess of Erroll. On her death without issue the grandson of her sister, James, Lord Boyd succeeded.
James, 13th Earl would have united in her person the four ____ of Errol, Kilmarrmaret, Lintethow and Callundar, had the last there not been attainted, as well as the ___ ___ of Lord High Constable of Scotland. Died July 3, 1795.
George, 14th Earl, son of James. Died June 1798.
William, 15th Earl, brother of George, assumed also the additional surname and name of Carr. By his first wife he had only a daughter. His oldest son by his second wife (James) was killed at Waterloo. Died 1819.
William George, 16th Earl, second son of William by his second wife. Died 1846. Suceeded by William Henry.
![]() |
| History p.23 |
Gilbert Hay, died Sept 7, 1436
1452 Sir William Hay of Errol. Hereditary High Constble, s.+h. of Gilbert Hay (who died v.p. Sept 7, 1436) by Alice, dau. of Sir William Hay of Yester, succeeded his grandfather, William Hay, May 20, 1437. He was created Lord of Parliament before 17 March, 1449-50; created Earl of Errol 12 June 1452; married Beatrice, 2nd dau. of Earl of Douglas.
1462 Nicholas, married Elizabeth Seton, dau. of Earl of Huntley, died 1470
1470 William, married (1) Isabel dau. of Geo. Gordon, Earl of Huntley, (2) Eliabeth Leslie; died 1506-07.
1507 William, s.+h. by 1st wife; (1) Christiana, dau. of Lord Blaimis, (2) Margaret, dau. of Andrew Kerr; killed at Floddam, 1513.
1513 William, only s.+h.by 1st wife was second heir to his father, married Elizabeth, dau. of Lorth Ruthven; died 1522.
1522 William, married Helen, dau. of Earl of Lennox; died 18th April, 1541.
1541 George, cousin and ___ ___, ___ s.+h. of Thomas Hay of Lazy Almond, C Perth. This Thomas was 2nd son of 3rd Earl and was slain at Roddam Dignities then limited to him and heirs male, a descendant of Earl Andrew by his 2nd wife, though descendants through female line continued.
1574 Francis, 2nd (or 3rd) son by 1st wife (earlier sons were passed over as being deaf & dumb), _____ ____ the ___ of Spain, escaped to Holland, pardoned 1597; married (1) Margaret, dau. of Earl of Moray, (2) Mary, dau. of Earl of Athol, (3) Elizabeth, dau. of Earl Morton; died 1633.
1633 Gilbert, only son of second heir to his father and grandfather, reigned his ____ and received at some point to have male or female, which __ to him he should appoint; married Catherine, dau. of Earl of Sautbush.
![]() |
| History p.24 |
1674 John Hay, a cousin, son of Sir Andrew Hay of Killam, nominated by Gilbert; married Ann, dau. of Earl of Perth.
1704 Charles, ____(?) h. to his father; imprisoned in Edinburgh Castle; unmarried
1717 Mary, eldest sister Countess of Errol; married Alexander Falconer who later assumed the name Hay.
1758 James (Boyd) Hay, grandnephew and h. of 2nd, but 1st surviving son of William Boyd, Earl of Kilmarnock and Anne (Linlithgow and Callender) who married the sister of the above named Mary; married (1) Rebecca Lockheart, (2) Isabella Carr
1778 George Hay, son of 2nd wife; married Elizabeth Black
1798 William Hay - Carr, married (1) Jane Peallo, (2) Alicia Elliot, (3) Harriet Mark.
1819 William George, 2nd but 1st remaining son by 3rd wife; created Baron Kilmarnock; married Elizabeth Fitzclarence.
1846 William Harry, married Eliz. Amelia, dau. of Sir Charles Gore.
1891 Charles Gore, married Mary Caroline L'Estraugr.
In an article "Hays of Errol" by J.D.H. Rt Hose J. C. Dalrymple Hay, 3rd Part, in Northern Notes and Queries, Vols. 1 & 3, notes on earlier lords --
"The important office of "Constable" was confirmed on 13 Nov 1315 by King Robert on Sir Gilbert Hay of Errol ___(?) (but independently) the lands of Slaine, Co. Aberdeen.
This Sir Gilbert was great-grandfather of Sir William Hay, above mentioned, who was grandfather of the 1st Earl."